Warning: mktime() [
function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: date() [
function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: mktime() [
function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: date() [
function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: mktime() [
function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: date() [
function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: mktime() [
function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: date() [
function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: mktime() [
function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: date() [
function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: mktime() [
function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: date() [
function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: mktime() [
function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: date() [
function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: mktime() [
function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: date() [
function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: mktime() [
function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
Warning: date() [
function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Tokyo' for 'JST/9.0/no DST' instead in
/home/d/emotd.com/www/2004/04/03.html on line
161
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2004年4月3日号
ELECOMの無線PCIボードLD-WL54AG/PCIを入手して、
FreeBSD(5.2.1R) boxに入れてみた。
チップはAtherosのAR5212である。
FreeBSDにおけるAtherosへの対応状況は、
ドライバath(4)のマニュアルのような状況になっていて、
WPAが使えないとか、
WEPも128bitまでとか、
a/gの同時通信はできないとかの制約はあるものの、
infrastructure modeやad-hoc modeの他に、
host-based access point modeになることができるようになっている。
if_ath.koをloadすると、
一緒にif_ath_hal.koも読み込まれて、
下準備はそれだけ。
以下、
ブートメッセージから抜粋。
FreeBSD 5.2.1-RELEASE-p4 #0: Thu Mar 31 20:23:32 JST 2004
Preloaded elf module "/boot/kernel/if_ath.ko" at 0xc0a3e354.
Preloaded elf module "/boot/kernel/ath_hal.ko" at 0xc0a3e400.
CPU: Intel Pentium III (598.48-MHz 686-class CPU)
ath0: mem 0xdffb0000-0xdffbffff irq 10 at device 9.0 on pci0
ath0: mac 5.9 phy 4.3 5ghz radio 3.6
ath0: 11a rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
ath0: 802.11 address: 00:90:fe:**:**:**
あとは、
マニュアルにあるサンプルを真似すればok。
/etc/start_if.ath0に次のようにしておいた。
ifconfig ath0 inet 192.168.aa.bb netmask 0xffffff00 ssid ******** mode 11a mediaopt hostap wepmode on wepkey *************
Windows XPのThinkPad T40と通信させてみたところ、
FTP(同時3セッション)で計って、
11aだと26Mbps、
11gだと20Mbps程度の速度となった。
ちなみにFreeBSD側のCPUはPentium IIIの600MHzである。
このように概ね良好なのだが、
ときどき息を付くように流れが悪くなることがあるのが気になる。
何度か接続切断を繰り返している間に、
息付きがまったく出なくて非常にスムーズな場合もあるし、
息付きがあって、
リモートでのシェル操作で応答に3,4秒待たされる場合もある。
これでa/gの同時通信ができるようになれば、
いいのだがなあ。